CN117965155A - Acidizing, yield increasing and injection increasing agent for oil field - Google Patents
Acidizing, yield increasing and injection increasing agent for oil field Download PDFInfo
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- CN117965155A CN117965155A CN202410371197.3A CN202410371197A CN117965155A CN 117965155 A CN117965155 A CN 117965155A CN 202410371197 A CN202410371197 A CN 202410371197A CN 117965155 A CN117965155 A CN 117965155A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 title claims abstract description 30
- 239000007924 injection Substances 0.000 title claims abstract description 30
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 42
- 239000003921 oil Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- -1 iron ion Chemical class 0.000 claims abstract description 28
- 150000007524 organic acids Chemical class 0.000 claims abstract description 27
- 239000004094 surface-active agent Substances 0.000 claims abstract description 26
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 21
- 239000001103 potassium chloride Substances 0.000 claims abstract description 21
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 21
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 18
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 18
- JSYPRLVDJYQMAI-ODZAUARKSA-N (z)-but-2-enedioic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)\C=C/C(O)=O JSYPRLVDJYQMAI-ODZAUARKSA-N 0.000 claims abstract description 14
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims abstract description 14
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 14
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229940106681 chloroacetic acid Drugs 0.000 claims abstract description 14
- 239000011975 tartaric acid Substances 0.000 claims abstract description 14
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 14
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 6
- 239000002738 chelating agent Substances 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims abstract description 5
- 239000000080 wetting agent Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 48
- 235000019198 oils Nutrition 0.000 claims description 35
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 16
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical group CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 claims description 12
- GBPOWOIWSYUZMH-UHFFFAOYSA-N sodium;trihydroxy(methyl)silane Chemical compound [Na+].C[Si](O)(O)O GBPOWOIWSYUZMH-UHFFFAOYSA-N 0.000 claims description 9
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 claims description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 4
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 claims description 4
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 4
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 150000004665 fatty acids Chemical class 0.000 claims description 4
- 239000002509 fulvic acid Substances 0.000 claims description 4
- 229940095100 fulvic acid Drugs 0.000 claims description 4
- 235000010352 sodium erythorbate Nutrition 0.000 claims description 4
- 239000004320 sodium erythorbate Substances 0.000 claims description 4
- 239000000176 sodium gluconate Substances 0.000 claims description 4
- 235000012207 sodium gluconate Nutrition 0.000 claims description 4
- 229940005574 sodium gluconate Drugs 0.000 claims description 4
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 claims description 4
- RBWSWDPRDBEWCR-RKJRWTFHSA-N sodium;(2r)-2-[(2r)-3,4-dihydroxy-5-oxo-2h-furan-2-yl]-2-hydroxyethanolate Chemical compound [Na+].[O-]C[C@@H](O)[C@H]1OC(=O)C(O)=C1O RBWSWDPRDBEWCR-RKJRWTFHSA-N 0.000 claims description 4
- 235000019864 coconut oil Nutrition 0.000 claims description 3
- 239000003240 coconut oil Substances 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- UZVUJVFQFNHRSY-OUTKXMMCSA-J tetrasodium;(2s)-2-[bis(carboxylatomethyl)amino]pentanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC[C@@H](C([O-])=O)N(CC([O-])=O)CC([O-])=O UZVUJVFQFNHRSY-OUTKXMMCSA-J 0.000 claims description 2
- 239000002535 acidifier Substances 0.000 claims 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims 1
- 229910001447 ferric ion Inorganic materials 0.000 claims 1
- 229940049964 oleate Drugs 0.000 claims 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims 1
- 230000020477 pH reduction Effects 0.000 abstract description 14
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000002195 synergetic effect Effects 0.000 abstract description 5
- 239000002734 clay mineral Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008961 swelling Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- HDETVIAMQNTONT-UHFFFAOYSA-N C[SiH2]O.[Na] Chemical compound C[SiH2]O.[Na] HDETVIAMQNTONT-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- OZZOVSQSDIWNIP-UHFFFAOYSA-N acetic acid;azane Chemical compound [NH4+].[NH4+].CC([O-])=O.CC([O-])=O OZZOVSQSDIWNIP-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000012085 test solution Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000003623 enhancer Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- LPMBTLLQQJBUOO-KTKRTIGZSA-N (z)-n,n-bis(2-hydroxyethyl)octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)N(CCO)CCO LPMBTLLQQJBUOO-KTKRTIGZSA-N 0.000 description 1
- IPKVMFWHPAULEL-UHFFFAOYSA-N 2-iminoethanol Chemical compound OCC=N IPKVMFWHPAULEL-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 238000001276 Kolmogorov–Smirnov test Methods 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000002579 anti-swelling effect Effects 0.000 description 1
- 239000002519 antifouling agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012353 t test Methods 0.000 description 1
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- Detergent Compositions (AREA)
Abstract
The invention discloses an acidification yield-increasing and injection-increasing agent for an oil field. The composite material consists of the following components in parts by weight: 15-30 parts of organic acid, 5-10 parts of scale remover, 1-3 parts of chelating agent, 3-5 parts of dispersing agent, 3-8 parts of surfactant, 3-6 parts of iron ion stabilizer, 1-3 parts of wetting agent, 3-5 parts of polyacrylamide, 1-3 parts of potassium chloride and 60-150 parts of water. The injection increasing agent can be used in the reservoir acidification construction technology, and can prevent clay minerals from swelling when meeting water, reduce interfacial tension of oil water and inhibit scale. The tartaric acid and chloroacetic acid combination, the hydroxyethylidene ammonium diphosphonate and the maleic acid-acrylic acid copolymer combination, the octylphenol polyoxyethylene ether and the cocamidopropyl hydroxysulfobetaine combination are used for synergistic effect.
Description
Technical Field
The invention belongs to the technical field of oil extraction in an oil field, and particularly relates to an acidification yield-increasing and injection-increasing agent for an oil field.
Background
Acidizing is an effective method for increasing the production of oil wells in sandstone formations. The method is to squeeze acid liquid into stratum through well hole, to erode the communicating pore or natural/hydraulic crack wall rock in reservoir and dissolve the slurry leaking into or lost into stratum pore or crack, to enlarge or dredge stratum seepage channel, improve stratum permeability, and improve stratum diversion capacity, to increase oil well production.
Clay minerals in an oilfield reservoir are adsorbed and injected into water to expand, so that the damage to the reservoir caused by pore permeability of the reservoir is reduced, the water injection pressure of a water injection well is high, and the yield of an oil-gas field is reduced. Corrosion products, scale, bacteria and the like, the injected water can corrode pipelines in the injection process, and the generated corrosion products can cause stratum blockage. The incompatibility of injected water and formation water can produce a large amount of inorganic salt scales which can be adsorbed on the surface of rock to block pore channels.
Disclosure of Invention
The invention aims to provide an acidification yield-increasing injection-increasing agent for an oil field.
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 15-30 parts of organic acid, 5-10 parts of scale remover, 1-3 parts of chelating agent, 3-5 parts of dispersing agent, 3-8 parts of surfactant, 3-6 parts of iron ion stabilizer, 1-3 parts of wetting agent, 3-5 parts of polyacrylamide, 1-3 parts of potassium chloride and 60-150 parts of water.
The organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1.
The scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1.
The chelating agent is one or more of sodium gluconate, ammonium diacetyl amide tetraacetate, sodium nitrilotriacetate and sodium glutamate diacetate.
The dispersing agent is one or more of ethylene glycol butyl ether, ethylene glycol dibutyl ether, coconut oil fatty acid diethanolamide and fatty alcohol polyoxyethylene ether.
The surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The iron ion stabilizer is one or more of citric acid, fulvic acid, sodium erythorbate and sodium ethylenediamine tetraacetate.
The wetting agent is one or more of sodium methyl siliconate, alkylphenol ethoxylates, cetyltrimethylammonium bromide and oleic acid diethanolamide.
The invention has the beneficial effects that: the injection increasing agent can be used in the reservoir acidification construction technology, and can prevent clay minerals from swelling when meeting water, reduce interfacial tension of oil water and inhibit scale. The tartaric acid and chloroacetic acid combination, the hydroxyethylidene ammonium diphosphonate and the maleic acid-acrylic acid copolymer combination, the octylphenol polyoxyethylene ether and the cocamidopropyl hydroxysulfobetaine combination are used for synergistic effect.
Detailed Description
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of organic acid, 7 parts of scale remover, 2 parts of ammonium diacetate, 4 parts of ethylene glycol butyl ether, 6 parts of surfactant, 4 parts of citric acid, 2 parts of sodium methyl siliconate, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of organic acid, 7 portions of scale remover, 2 portions of diacetyl amide tetraacetic acid ammonium, 4 portions of glycol butyl ether, 6 portions of surfactant, 4 portions of citric acid, 2 portions of sodium methyl siliconate, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are taken, added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Example 2
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 18 parts of organic acid, 6 parts of scale remover, 1 part of sodium nitrilotriacetate, 1 part of ethylene glycol dibutyl ether, 2 parts of coconut oil fatty acid diethanolamide, 4 parts of surfactant, 3 parts of fulvic acid, 1 part of alkylphenol ethoxylate, 3 parts of polyacrylamide, 1 part of potassium chloride and 70 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: 18 parts of organic acid, 6 parts of scale remover, 1 part of sodium nitrilotriacetate, 1 part of ethylene glycol dibutyl ether, 2 parts of coconut fatty acid diethanolamide, 4 parts of surfactant, 3 parts of fulvic acid, 1 part of alkylphenol ethoxylate, 3 parts of polyacrylamide, 1 part of potassium chloride and 70 parts of water are added into a container according to parts by weight, and the mixture is heated to 40 ℃, stirred for 18min and cooled to room temperature (25 ℃), thus obtaining the novel detergent.
Example 3
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 28 parts of organic acid, 9 parts of scale remover, 3 parts of sodium gluconate, 4 parts of fatty alcohol polyoxyethylene ether, 7 parts of surfactant, 3 parts of sodium erythorbate, 3 parts of sodium ethylenediamine tetraacetate, 3 parts of cetyl trimethyl ammonium bromide, 5 parts of polyacrylamide, 3 parts of potassium chloride and 140 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: 28 parts of organic acid, 9 parts of scale remover, 3 parts of sodium gluconate, 4 parts of fatty alcohol-polyoxyethylene ether, 7 parts of surfactant, 3 parts of sodium erythorbate, 3 parts of sodium ethylenediamine tetraacetate, 3 parts of cetyl trimethyl ammonium bromide, 5 parts of polyacrylamide, 3 parts of potassium chloride and 140 parts of water are added into a container according to parts by weight, heated to 50 ℃, stirred for 12min and cooled to room temperature (25 ℃), so as to prepare the organic acid-containing detergent.
Comparative example 1
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of tartaric acid, 7 parts of a scale remover, 2 parts of ammonium diacetamide tetraacetate, 4 parts of ethylene glycol butyl ether, 6 parts of a surfactant, 4 parts of citric acid, 2 parts of sodium methyl siliconate, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of tartaric acid, 7 portions of scale remover, 2 portions of diacetyl amide tetraacetic acid, 4 portions of glycol butyl ether, 6 portions of surfactant, 4 portions of citric acid, 2 portions of sodium methyl siliconate, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are taken, added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Comparative example 2
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of chloroacetic acid, 7 parts of a scale remover, 2 parts of ammonium diacetamide tetraacetate, 4 parts of ethylene glycol butyl ether, 6 parts of a surfactant, 4 parts of citric acid, 2 parts of sodium methyl siliconate, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of chloroacetic acid, 7 portions of scale remover, 2 portions of diacetyl amide tetraacetic acid, 4 portions of ethylene glycol butyl ether, 6 portions of surfactant, 4 portions of citric acid, 2 portions of sodium methyl siliconate, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are taken, added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Comparative example 3
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of organic acid, 7 parts of hydroxyethylidene ammonium biphosphonate, 2 parts of diacetyl amide ammonium tetraacetate, 4 parts of ethylene glycol butyl ether, 6 parts of surfactant, 4 parts of citric acid, 2 parts of sodium methyl silanol, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2:1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of organic acid, 7 portions of hydroxyethylidene ammonium diphosphonate, 2 portions of diacetyl amide tetraacetic acid, 4 portions of ethylene glycol butyl ether, 6 portions of surfactant, 4 portions of citric acid, 2 portions of sodium methyl silanol, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are added into a container, and the mixture is heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Comparative example 4
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of organic acid, 7 parts of maleic acid-acrylic acid copolymer, 2 parts of ammonium diacetate, 4 parts of ethylene glycol butyl ether, 6 parts of surfactant, 4 parts of citric acid, 2 parts of sodium methyl silanol, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to the mass ratio of 2: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of organic acid, 7 portions of maleic acid-acrylic acid copolymer, 2 portions of diacetyl amide tetraacetic acid ammonium, 4 portions of ethylene glycol butyl ether, 6 portions of surfactant, 4 portions of citric acid, 2 portions of sodium methyl silanol, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Comparative example 5
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of organic acid, 7 parts of scale remover, 2 parts of ammonium diacetate, 4 parts of ethylene glycol butyl ether, 6 parts of octyl phenol polyoxyethylene ether, 4 parts of citric acid, 2 parts of sodium methyl siliconate, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of organic acid, 7 portions of scale remover, 2 portions of diacetyl amide tetraacetic acid, 4 portions of ethylene glycol butyl ether, 6 portions of octyl phenol polyoxyethylene ether, 4 portions of citric acid, 2 portions of sodium methyl silanol, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are taken, added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Comparative example 6
The acidizing, yield increasing and injection increasing agent for the oil field comprises the following components in parts by weight: 22 parts of organic acid, 7 parts of scale remover, 2 parts of ammonium diacetate, 4 parts of ethylene glycol butyl ether, 6 parts of cocamidopropyl hydroxysulfobetaine, 4 parts of citric acid, 2 parts of sodium methyl silanol, 4 parts of polyacrylamide, 2 parts of potassium chloride and 120 parts of water; the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1.
The acidification yield-increasing and injection-increasing agent for the oil field is prepared according to the following steps: according to the weight portions, 22 portions of organic acid, 7 portions of scale remover, 2 portions of ammonium diacetate, 4 portions of glycol butyl ether, 6 portions of cocamidopropyl hydroxysulfobetaine, 4 portions of citric acid, 2 portions of sodium methyl silanol, 4 portions of polyacrylamide, 2 portions of potassium chloride and 120 portions of water are added into a container, heated to 45 ℃, stirred for 15min and cooled to room temperature (25 ℃), thus obtaining the product.
Experimental example:
The anti-swelling performance test is carried out according to the oil industry standard of SY/T5971-94 ' clay stabilizer for Water injection ' performance evaluation method ', wherein the test liquid is 0.5% of the injection enhancer (the injection enhancers prepared in examples 1-3 and comparative examples 1-2), 20% of the composite acid liquid and the balance of water; the raw materials of the composite acid liquor comprise 10% of ammonium fluoride, 20% of hydrochloric acid and the balance of water.
Each group of experiments was averaged 3 times and statistically analyzed using SPSS 24.0 software with the data results measuredThe (mean ± standard deviation) represents that the data normalization test is carried out by adopting a Kolmogorov-Smirnov test method, and the comparison of the mean difference between two groups adopts a t test for data conforming to the normal distribution, and has statistical significance by taking P <0.05 as the difference.
The measurement results are shown in Table 1:
TABLE 1
Note that: * Representing a comparison of P <0.05 with example 1 group.
The expansion resistance of the injection enhancer is an important index, and if the injection enhancer causes the expansion of the clay or rock in the oil layer after injection, the expansion of the clay or rock can cause collapse to prevent further exploitation of petroleum, and as can be seen from table 1, the expansion resistance and the expansion shrinkage of the test solutions of examples 1-3 are equivalent, no significant difference exists, and the expansion resistance and the expansion shrinkage of the test solutions of example 1 are significantly higher than those of comparative examples 1 and 2, so that the combined use of tartaric acid and chloroacetic acid proves to be synergistic.
The interfacial tension was measured using a rotary drop interfacial tension contact angle meter, with a test solution of 0.5% of the injection enhancing agent (the injection enhancing agents prepared in examples 1-3 and comparative examples 5-6), 20% of the composite acid solution, and the balance water; the raw materials of the composite acid liquor comprise 10% of ammonium fluoride, 20% of hydrochloric acid and the balance of water.
The measurement results are shown in Table 2:
TABLE 2
Note that: * Representing a comparison of P <0.05 with example 1 group.
The higher the interfacial tension of the oil layer to be exploited, the more the oil layer is blocked from flowing, and the exploitation efficiency is reduced, as can be seen from table 2, the test liquids of examples 1-3 have comparable interfacial tension without significant difference, and the test liquid of example 1 has significantly lower interfacial tension than comparative examples 5 and 6, which proves the synergistic effect of the combination of octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine.
According to SY/T5673-93 requirements of "method for evaluating performance of anti-fouling agent for oilfield", evaluation experiments are carried out on the performance of the injection-enhancing agent CaCO 3、CaSO4 prepared in examples 1-3 and comparative examples 3-4, the working concentration of the injection-enhancing agent is 0.35%, and the measurement results are shown in Table 3:
TABLE 3 Table 3
Note that: * Representing a comparison of P <0.05 with example 1 group.
The corrosion products, scale matters, bacteria and the like can corrode pipelines in the injection process, and the generated corrosion products can cause formation blockage, so that the scale inhibition performance of the injection enhancing agent is an important performance, and as can be seen from table 3, the scale inhibition rates of the test solutions of examples 1-3 are equivalent, no significant difference exists, the scale inhibition rate of the test solution of example 1 is significantly higher than that of comparative examples 3 and 4, and the combined use of the hydroxyethylethylene diphosphonate and the maleic acid-acrylic acid copolymer proves that the effects are synergistic.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. The acidizing yield-increasing injection agent for the oil field is characterized by comprising the following components in parts by weight: 15-30 parts of organic acid, 5-10 parts of scale remover, 1-3 parts of chelating agent, 3-5 parts of dispersing agent, 3-8 parts of surfactant, 3-6 parts of ferric ion stabilizer, 1-3 parts of wetting agent, 3-5 parts of polyacrylamide, 1-3 parts of potassium chloride and 60-150 parts of water;
the organic acid is tartaric acid and chloroacetic acid according to the mass ratio of 3: 1; the scale remover is prepared from ammonium hydroxyethylidene diphosphonate and maleic acid-acrylic acid copolymer according to the mass ratio of 1: 1.
2. The acidifying, yield-increasing and injection-increasing agent for oil field according to claim 1, wherein the chelating agent is one or more of sodium gluconate, ammonium diacetamide tetraacetate, sodium nitrilotriacetate and sodium glutamate diacetate.
3. The acidifying agent for increasing yield and injection for oil field of claim 1, wherein the dispersant is one or more of ethylene glycol butyl ether, ethylene glycol dibutyl ether, coconut oil fatty acid diethanolamide, and fatty alcohol polyoxyethylene ether.
4. The acidifying, yield-increasing and injection-increasing agent for oil fields according to claim 1, wherein the surfactant is octyl phenol polyoxyethylene ether and cocamidopropyl hydroxysulfobetaine according to a mass ratio of 2:1.
5. The acidifying agent for increasing yield and injection for oil field of claim 1, wherein the iron ion stabilizer is one or more of citric acid, fulvic acid, sodium erythorbate and sodium ethylenediamine tetraacetate.
6. The acidifying, yield-increasing and injection-increasing agent for oil fields according to claim 1, wherein the wetting agent is one or more of sodium methyl siliconate, alkylphenol ethoxylates, cetyltrimethylammonium bromide and diethanolamide oleate.
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